Do the following problems without your calculator, using the properties of multiplication to help you.

Problem 3.1: 6×7×5 = ? [Solution]

Problem 3.2: 5×(27×20) [Solution]

Problem 3.3: 6×(2 + 10) [Solution]

Problem 3.4: 5×876×156×7×4×0 = ? [Solution]

Problem 3.5: 5×1×1×4×1 = ? [Solution]

Problem 3.6: (5 + 4)×1 = ? [Solution]

Which properties of multiplication (Associative, Commutative, Distributive, Identity, Zero Product Property) are used in the following?

Problem 3.7: 5×78×0 = 0 [Solution]

Problem 3.8: 65×(9 + 10) = (65×9) + (65×10) [Solution]

Problem 3.9: (6×5)×11 = (5×6)×11 [Solution]

Problem 3.10: (9×8)×3 = 9×(8×3) [Solution]

Problem 3.11: 52×1 = 52 [Solution]